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N. PETERS, PHOTO-LITHOGRAFHER, WASHINGON. D CV ALBERT B. BEAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T0 HIMSELF AND W. T. SCR-ANTON, OF SAME PLACE.

Letters Patent No. 77,347, dated April 28, 1868.

IMPROVEMENT IN NUT-MAGHINES.

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TO yALL WHOM IT MAY CONOERN:

Be it known that I, ALBERT B. BEAN, of New Haven, in theicounty ot' New Haven, and State of Connecvtient, have invented a new Improvement in Nut-Machines; and I do hereby declare the following, when taken in connection with the-accompanying drawings, and the letters of reference marked thereon, to he a'full, clearA and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure l a side view,

Figure 2 a top view,

Figures 3 and 4, partial side views toillustrate the improvement.

This invention relates to an improvement in machines for the manufacture of metal nuts -for bolts, and more particularly to the machine for which Letterslatent .were granted to me, bearing date March It), 1867.

One great diiiiculty in this class of machines arises from the fact that it is impossible at all times that the same quantity of metal should enter the die; therefore, if there be not suiicient metal, the nut will be imperfectly'formed, or if there `be too much, the strain upon the machine is very great, and of tensuiiicient to break some part. 'Io overcome this diiliculty is the object of my present invention; and it consists in the arrangement of a spring upon, the face of the cam, which being of suiiicient strength to perfectly form the nut if a little less than the necessary quantity of metal enters the die, and yet so as to yield if there be too much metal, thus, while forming a perfect nut, at all times relieves the machine from the strain which would otherwise come upon it. l

`To enable others to construct and use my improvement, I will proceed to describe the same'as illustrated in the accompanying drawings. n

Although nearly a duplicate of my former machine,I will briefly describe the present machine before proceeding to this specific invention. 'l

A' is the bed-plate, B the main shaft, supported in bearings C, and causedto revolve by the application of power thereto in any convenient manner. D is the die-holder, in the'face of which the die is placed, and the said die-holder attached to n, slide, E, moving in proper guides F, by means of an eccentric, G, on the drivingf shaft. II is the crowner-holder, moving within the slideiE, and operated bythe camsI. J'is the punch-carrier, moving within the slide I'I/by means ofv a cam,'K. Mis a fixed punch, arranged ,in a holder, N, and so that the said holder may be swung outward upon a pivot, I,"as occasion may require. "lhe several slides are returned by a cum or pin, a, on one of'thecams I acting against levers R S. l

The metal from which the nut is to`b`e formed, after beingr heated, is placed between the punch andthe dies in the holder D the machine then set in motion; the erowner advances to hold the metal; then the die passes over, cutting away the surplus metal; then the punch CZ in the holder Jpunches the hole inthe nut then, retreating, the nut is discharged finished-. A This general description, in view of the patent before referred to, will be all-sutlicient for the illustration of the present improvement.

It will be readily seen that the movement of the severa-l parts is positive, and that too little metal -would form an imperfect nut, while too much must necessarily strain' themachine. To avoid this, on the face of the cam or cams I, I arrange a spring,f, deuotedin heavy black, figs. 3 and 4, extending from thewpoint of greatest pressure back to a point snihciently distant to give the necessaryelasticity to the spring. At that distant point, g, the spring is firmly xed to the cam'; the other end projects from the face vof the cam, and a recess is formed in thecam so as to allow the spring' to recede, the end of the spring being' turned down to give an easy movement from the spring on to the face of the cam. This spring must be of sufli-cientstrength to give the pressure necessary for the perfectly filling ofthe nut when a little less than the requisitcquantity of metal is in the die,

and thus produce a nut slightly thinner than should be in the general run of thc samenuts from the machine.

It', however, there may be more metal in the die, then, as the cam approaches the greatest point of pressure,

as denotedin fig. 4, the spring f will yield, so that while it gives the requisite pressurelto form s perIect nut,

will relieve the machine from the strain which would otherwise come upon it.

A The arrangement of this spring or springsf, adds very little to the cost of the machine, and affords sufcient compensation for the greatest variation ofthe metal, and is positive and reliable, and although peculiarly adapted to my nut-machine, is equally so to other rrwichinesl Having thus fully described my invention, what I claim as new and useful, and desire to secure by Letters Patent, is

The arrangement 0f a spring,r or springsfupon the face of the cam, so :is to yield at the point of pressure,

and relieve the strain upon the machine, substantially as heren sei; forth,

ALBERT B. BEAN.

Witnesses:

JoIIN H. SHUMWAY, A. J. Timms. 

